Thanks. Someone else mentioned that about the bead (I hadn't noticed it). I went back and checked the others in the bag and they were all drilled with the same-sized hole on both sides; not sure if it was intentional or a defective batch.

I tend to reverse the beadhead when I tye Skip Morris's "Racoon" pattern. It pushes the bead forward slightly and I like the look. Not sure if it changes how the fly behaves, but I still do this intentionally.